# Seeed Grove Round Force Sensor (FSR402)

> Seeed Studio Grove Round Force Sensor (101020553): an Interlink FSR 402 force-sensitive resistor on a Grove module with an on-board divider and 3.3 V regulator — plug into any Grove analog port, no resistor math. 0.2–20 N sensitivity, analog output 0–650, >10 MΩ unloaded / 1 kΩ minimum, <3 µs rise, 3.3 V / 5 V, 75 × 20 × 11 mm, 2.5 g.

- Manufacturer: Seeed Studio
- Part number: 101020553
- Category: Tactile & touch sensors
- Canonical page: https://www.xirkit.io/products/seeed-grove-round-force-sensor-fsr402-ede8
- Pinout: https://www.xirkit.io/products/seeed-grove-round-force-sensor-fsr402-ede8/pinout
- Structured JSON: https://www.xirkit.io/products/seeed-grove-round-force-sensor-fsr402-ede8/data.json
- Source: Xirkit structured parts catalog — every value traced to a cited document; unknowns are explicit.

## Key specifications

| Property | Value |
| --- | --- |
| Sensing | force sensitive resistor |
| Active area shape | round |
| Force range (min) | 0.2 N |
| Force range (max) | 20 N |
| Output | analog voltage 0–650 (10-bit), resistance >10 MΩ unloaded to 1 kΩ |
| Interface | analog |
| Weight | 2.5 g |
| Dimensions | 75 × 20 × 11 mm |

## Pinout (4 pins, 0 with electrical limits)

| Pin | Position | Kind | Chip pad | Functions | VIH | VIL | VOH | VOL | IOH | IOL | 5 V tolerant |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| VCC | Grove 4-pin | power in | — | power_in | — | — | — | — | — | — | — |
| GND | Grove 4-pin | ground | — | ground | — | — | — | — | — | — | — |
| NC | Grove 4-pin | other | — | nc | — | — | — | — | — | — | — |
| SIG | Grove 4-pin | signal | — | sig | — | — | — | — | — | — | — |

## Where to buy

| Supplier | Price | Stock | Checked | URL |
| --- | --- | --- | --- | --- |
| www.seeedstudio.com | 14.9 USD | unknown | 2026-10-01 | https://www.seeedstudio.com/Grove-Round-Force-Sensor-FSR402.html |

## FAQ

**How much does the Seeed Grove Round Force Sensor cost?**

From $14.9 at www.seeedstudio.com. Prices are observed unit prices before tax and shipping.

**What are the Seeed Grove Round Force Sensor dimensions?**

75 × 20 × 11 mm. A STEP model is available for enclosure fit checks.

**Where does this Seeed Grove Round Force Sensor data come from?**

Every value in this record is traced to a source — 2 documents including the board and chip datasheets — with the page and table cited per value. Unknowns are left explicit, never guessed.

## Sources

- [Seeed Grove Round Force Sensor (FSR402) datasheet](https://www.seeedstudio.com/Grove-Round-Force-Sensor-FSR402.html)
- [www.seeedstudio.com listing](https://www.seeedstudio.com/Grove-Round-Force-Sensor-FSR402.html)

## Part graph

### Alternatives (by use case)

- [Adafruit AT42QT1070 5-Pad Touch Sensor](https://www.xirkit.io/products/adafruit-at42qt1070-5-pad-touch-sensor-a70d) — Both serve touch and force sensing — check the trade-offs; $7.5 vs $14.9
- [Interlink FSR 402 Round FSR 12.7 mm](https://www.xirkit.io/products/interlink-fsr-402-round-fsr-12-7-mm-3272) — Both serve grasping and manipulation — check the trade-offs; $14.9 vs $10.95
- [Interlink FSR 406 Square FSR 38 mm](https://www.xirkit.io/products/interlink-fsr-406-square-fsr-38-mm-388a) — Both serve grasping and manipulation — check the trade-offs; $14.9 vs $17.5
- [Interlink FSR 400 Small Round FSR 5 mm](https://www.xirkit.io/products/interlink-fsr-400-small-round-fsr-5-mm-9120) — Both serve grasping and manipulation — check the trade-offs; $14.9 vs $10.95
- [Adafruit MPR121 12-Key Capacitive Touch](https://www.xirkit.io/products/adafruit-mpr121-12-key-capacitive-touch-b241) — Both serve touch and force sensing — check the trade-offs; $14.9 vs $7.95
- [Interlink FSR 408 Long Strip, 24 in](https://www.xirkit.io/products/interlink-fsr-408-long-strip-24-in-d29d) — Both serve grasping and manipulation — check the trade-offs; $14.9 vs $19.95